NRDC Technology offer-Highly Abrasive Silica

PLANT PARAMETERS
Capacity	1000 Kg/day or 300MT/annum
No. of Shifts per day	2
Working days per Year.	300
Land Area, m²	3000 sq. mt.
Covered Area, m²	650 sq. mt.
MANPOWER
Managerial	1
Skilled	9
Unskilled	4
RAW MATERIAL/DAY
Sodium Silicate (Glass)	1.25 MT
Sulfuric Acid (Oleum)	500 Kgs
Sodium Chloride	100 Kgs
UTILITIES/DAY
Power	400 KWH
Water	20 KL
Fuel (Kerosene)	250 Lits.
PLANT & MACHINERY
Thermic fluid heating system	1
Digestor for sodium silicate glass	1
Silicate storage tanks	1
SS 316 reactor jacked	1
Instrumentation & flow controls	--
Plate & frame type filter press	1
Flash drier having water evaporation	1
In-house fabrication of conveyor sys.	--
Jet Mill-30 HP with bag filter etc.	1
Pumps with motors	8
Air compressors	2
Weighing scale	1

USE USES : The Product is used by all gel toothpaste manufacturers.

SPECIFICATIONS

S. No.	Properties	Unit	Specified Limit
1.	Appearance	-	White free flowing powder
2.	Moisture Content (105^oC, 2 hrs)	%	6.0 max
3.	Loss on Ignition (100^oC, 2 hrs) (Anhydrous basis)	%	6.0 max
4.	Bulk Density (tapped 50)	gm/lit	400 min
5.	pH Value(5% aq. Slurry)	--	6 – 8
6.	Oil Absorption Value	%	50 - 80
7.	Si₂O Content (Anhydrous basis)	%	98.5 min
8.	Soluble Salts (Sulfates+Chlorides)	%	2.00 max
9.	Iron Content, (As FE⁺³ )	Ppm	250 max
10.	Particle Size Analysis (Malvern)D10 D50 D90	Micron Micron Micron	0.8 min 5-6.5 14.0 max
11.	Microbial (1) TVC (2) Y&M	Cfu/gm Cfu/gm	<300 <100
12.	RDA Value (By Method)	--	160 -220
13.	Viscosity, (10% Slurry)	Cps	400 max
14.	Heavy Metals, (Expressed as Pb)	ppm	15 max

PROCESS

Sodium silicate glass is digested in a digestor at high temp. and pressure and solution of desired concentration of sodium silicate is obtained. Using this solution and dilute-sulfuric acid, reaction is carried out in a reactor in presence of optimised quantity of electrolyte at elevated temp and in the optimised pH range of the reaction medium.

After completion of reaction in stipulated time, product slurry is filtered and washed with water in the plate and frame filter press to remove soluble salts generated during the reaction. The wet cake from filter press is then dried in flash drying system.

The flash dried powder product is then milled in AC Mill/Jet Mill to get the desired size distribution of finished product. The finished product is then packed in 25 kgs. HDPE/paper bag as per the requirement of the customer.

National Research Development Corporation, a Government of India Enterprise, is a premier technology transfer Corporation with four decades of experience. It has helped establish over one thousand projects in the small and medium scale sector.

The supply of technologies and services to entrepreneurs extend both in the developing and developed countries like USA, Germany, Malaysia, Burma, Nepal, Senegal, Madagascar, Indonesia Philippines, Vietnam, Lanka, Kenya, Brazil, Bangladesh and Egypt.

PLANT PARAMETERS